• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The TPS62420 device is a synchronous dual step-down DC-DC converter optimized for battery powered portable applications. It provides two independent output voltage rails powered by 1-cell Li-Ion or 3-cell NiMH/NiCD batteries. The device is also suitable to operate from a standard 3.3V or 5V voltage rail.

With an input voltage range of 2.5V to 6V, the TPS62420 is ideal to power portable applications like smart phones, PDAs, and other portable equipment.

With the EasyScale™ serial interface the output voltages can be modified during operation. It therefore supports Dynamic Voltage Scaling for low power DSP and processors.

The TPS62420 operates at 2.25MHz fixed switching frequency and enter the Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range.

特性

• High Efficiency—up to 95%
• V_IN Range From 2.5 V to 6 V
• 2.25 MHz Fixed Frequency Operation
• Output Current 600 mA and 1000 mA
• Adjustable Output Voltage From 0.6 V to V_IN
• Pin Selectable Output Voltage Supports Simple
  Dynamic Voltage Scaling
• EasyScale™ Optional One Pin Serial Interface for
  Dynamic Output Voltage Adjustment
• Power Save Mode at Light Load Currents
• 180° Out of Phase Operation
• Output Voltage Accuracy in PWM Mode ±1%
• Typical 32 µA Quiescent Current for both Converters
• 100% Duty Cycle for Lowest Dropout
• Available in a 10-Pin QFN (3×3mm)
• APPLICATIONS
  • Cell Phones, Smart-phones
  • PDAs, Pocket PCs
  • OMAP™ and Low Power DSP Supply
  • Portable Media Players
  • Digital Radio
  • Digital Cameras